Smattered across the Indian Ocean and made up over 1,000 intricate coral islands ... in the blue waters, until out of nowhere, with shocking speed, the shadowy figure of an enormous shark appears ...

sapphire-blue sea off the western coast of mainland Greece are the lush, green and incredibly photogenic Ionian islands, the most famous of which — Corfu, Kefalonia, Ithaca, Zakynthos ...